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ASN Lookup Tool
AS203 CENTURYLINK-LEGACY-LVLT-203

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS203
Organisation
Level 3 Parent, LLC
Name
CENTURYLINK-LEGACY-LVLT-203
Total IPv4 Addresses
129427
Total IPv4 Prefixes
212
Total IPv6 Prefixes
3
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#1,701 out of 77,299
Registry
Arin
Registered Country
US flag US
Registered Country Name
United States of America (the)
Registered Date
2002-06-05
Registration Last Change
2019-12-04
Receiving From

The list of active Autonomous Systems (ASs) which send traffic to that ASN.

ASN
Organisation
AS7018
US flagAT&T Services, Inc.
AS3356
US flagLevel 3 Parent, LLC
AS174
US flagCogent Communications
AS209
US flagCenturyLink Communications, LLC
AS22773
US flagCox Communications Inc.
Showing 5 of 19
IPv4 Active Prefixes

This provides the list of IPv4 address space routes/prefixes currently announced on Border Gateway Protocol (BGP).

Prefix4.4.27.128/27
Range From4.4.27.128
Range To4.4.27.159
Prefix4.4.61.192/26
Range From4.4.61.192
Range To4.4.61.255
Prefix4.14.40.160/27
Range From4.14.40.160
Range To4.14.40.191
Prefix4.14.216.128/26
Range From4.14.216.128
Range To4.14.216.191
Prefix4.59.53.128/26
Range From4.59.53.128
Range To4.59.53.191
Showing 5 of 212
IPv6 Active Prefixes
Prefix2606:6800::/40
Range From2606:6800::
Range To2606:6800:ff:ffff:ffff:ffff:ffff:ffff
Prefix2606:6800:1c00::/40
Range From2606:6800:1c00::
Range To2606:6800:1cff:ffff:ffff:ffff:ffff:ffff
Prefix2606:6800:3400::/40
Range From2606:6800:3400::
Range To2606:6800:34ff:ffff:ffff:ffff:ffff:ffff
Autonomous System (AS) is a network (or collection of networks) that are all managed and supervised by a single entity or organisation. This tool provides a comprehensive ownership and connectivity report for any given AS number.